package test;

import java.io.InputStream;

public class Person {

    protected InputStream Say() throws Exception {
        Boolean test = Boolean.FALSE;
        Integer test1 = 1;
        StringBuilder sb1 = new StringBuilder();//不是并发安全的
        StringBuffer sb2 = new StringBuffer();//并发安全的
        return null;
    }

    private void test() {

    }

    public int hashCode() {
        return 0;
    }
}
